US20070132932A1 - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- US20070132932A1 US20070132932A1 US11/545,995 US54599506A US2007132932A1 US 20070132932 A1 US20070132932 A1 US 20070132932A1 US 54599506 A US54599506 A US 54599506A US 2007132932 A1 US2007132932 A1 US 2007132932A1
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- pads
- liquid crystal
- substrate
- crystal display
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
Definitions
- the present invention relates to a liquid crystal display, and more particularly to, a liquid crystal display capable of preventing spots from being generated by difference in brightness of various regions of the display.
- FPDs flat panel displays
- CRTs cathode ray tubes
- the FPDs include liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs), and organic light emitting displays (OLEDs).
- LCDs liquid crystal displays
- FEDs field emission displays
- PDPs plasma display panels
- OLEDs organic light emitting displays
- the LCDs are small and light and have low power consumption. Therefore, the LCDs have been in the spotlight as substitutes that can overcome the disadvantages of the conventional CRTs.
- the LCDs are used in large monitors and TVs as well as in portable devices such as mobile telephones and personal digital assistants (PDA).
- Passive matrix LCDs having low power consumption are often used for portable display devices.
- FIG. 1 illustrates a conventional passive matrix LCD.
- the conventional passive matrix LCD includes a liquid crystal panel 2 , a data driver 8 for driving data lines D 1 to Dm of the liquid crystal panel 2 , and a scan driver 6 for driving scan lines S 1 to Sn of the liquid crystal panel 2 .
- the liquid crystal panel 2 includes pixels 4 positioned where the scan lines Si to Sn and the data lines D 1 to Dm cross over one another.
- the pixels 4 are selected when scan signals are supplied to the scan lines S 1 to Sn to emit light components corresponding to data signals supplied to the data lines D 1 to Dm.
- the scan driver 6 sequentially supplies the scan signals to the scan lines S 1 to Sn in accordance with control signals from a timing controller that is not shown.
- the data driver 8 generates the data signals in accordance with the control signals from the timing controller and supplies the generated data signals to the data lines D 1 to Dm in synchronization with the scan signals.
- the conventional LCD is obtained by attaching an upper substrate and a lower substrate to each other.
- an integrated circuit 10 is mounted on a lower substrate 12 of the LCD used for a portable device (for example, a mobile telephone).
- the circuits of the scan driver 6 and the data driver 8 are included in the integrated circuit 10 . Therefore, the integrated circuit 10 is commonly connected to the data lines D 1 to Dm and the scan lines S 1 to Sn.
- Pixels are arranged in a matrix in an effective display region 20 of the lower substrate 12 .
- the data lines D 1 to Dm formed in the effective display region 20 are electrically connected to the integrated circuit 10 to receive the data signals from the integrated circuit 10 .
- first pads 14 are formed on a first side of the effective display region 20 and second pads 16 are formed on a second side of the effective display region 20 opposite the first side.
- the first pads 14 are positioned near an upper side of the effective display region 20 and are electrically connected to the integrated circuit 10
- the second pads 16 are positioned near a lower side of the effective display region 20 and are electrically connected to the integrated circuit 10 .
- the first pads 14 are electrically connected to the scan lines S 1 to Sn/2 positioned in the upper part of the effective display region 20 of the upper substrate and the second pads 16 are electrically connected to the scan lines Sn/2+1 to Sn positioned in the lower part of the effective display region 20 of the upper substrate.
- the scan lines S 1 to Sn and the data lines D 1 to Dm are connected to the integrated circuit 10 and the effective display region 20 displays a predetermined image in response to the scan signals and the data signals supplied from the integrated circuit 10 .
- Dummy pads 18 are formed adjacent to the second pads 16 .
- the dummy pads 18 are used for maintaining a gap when the upper substrate and the lower substrate 12 are attached to each other. This gap corresponds to a cell gap created by formation of liquid crystal cells between the two substrates.
- spots are generated by difference in brightness in the parts where the dummy pads 18 are formed and/or on the boundaries between the dummy pads 18 and the second pads 16 . The spots are generated by non-uniformity in the heights of the dummy pads 18 and the second pads 16 when the upper substrate and the lower substrate 12 are attached to each other.
- LCD liquid crystal display
- an LCD obtained by attaching or coupling an upper substrate and a lower substrate together.
- the LCD includes a first pad unit positioned on a first upper side, or a first upper corner, of the lower substrate, a second pad unit positioned on a second lower side, or a second lower corner, of the lower substrate, the first upper corner and the second lower corner located diagonally opposite each other, an integrated circuit electrically connected to the first pad unit and the second pad unit, and dummy pads positioned on a second upper side, or on the other upper corner, of the lower substrate.
- the dummy pads are substantially symmetrical to the second pads with respect to a line of symmetry dividing the lower substrate into an upper portion and a lower portion.
- the dummy pads are not electrically connected to the integrated circuit.
- the LCD further includes data lines formed in an effective display region of the lower substrate to be electrically connected to the integrated circuit.
- the effective display region may also be called the display region.
- the first pad unit and the second pad unit are positioned outside the effective display region.
- the LCD further includes a third pad unit positioned on the upper substrate to be electrically connected to the first pad unit, a fourth pad unit positioned on the upper substrate to be electrically connected to the second pad unit, and scan lines formed in the effective display region of the upper-substrate to be electrically connected to the third pad unit and the fourth pad unit.
- the LCD further includes pixels positioned in the areas where the scan lines and the data lines cross over one another to display images corresponding to data signals supplied from the data lines.
- One embodiment includes a liquid crystal display having a first substrate and a second substrate coupled to and facing the first substrate.
- the first substrate includes a first display region, first pads, second pads, dummy pads and an integrated circuit.
- the second substrate includes a second display region facing the first display region, third pads electrically connected to the first pads and the fourth pads electrically connected to the second pads.
- the dummy pads are adapted to maintain a cell gap substantially uniform.
- FIG. 1 illustrates a conventional passive matrix liquid crystal display (LCD);
- FIG. 2 illustrates a lower substrate of the conventional LCD
- FIG. 3 illustrates a lower substrate of an LCD according to an embodiment of the present invention
- FIG. 4 illustrates an upper substrate of the LCD according to the embodiment of the present invention.
- FIG. 5 illustrates a dummy unit of the lower substrate illustrated in FIG. 3 .
- FIG. 6 illustrates a passive matrix LCD according to the embodiment of the present invention.
- FIGS. 3 and 4 schematically illustrate the lower substrate and the upper substrate of a passive matrix liquid crystal display (LCD) according to an embodiment of the present invention.
- the lower substrate and the upper substrate shown in FIGS. 3 and 4 may be used in the LCD of FIG. 6 .
- the lower substrate 112 of the LCD includes an effective display region 120 , an integrated circuit 110 , first pads 114 , second pads 116 , and dummy pads 118 .
- the effective display region 120 may also be referred to as the display region.
- the first pads 114 , the second pads 116 , and the dummy pads 118 may be respectively located in a first pad unit, a second pad unit, and a dummy pad unit.
- Pixels 40 are located in the effective display region 120 where the data lines D 1 to Dm cross over scan lines S 1 to Sn. The pixels are selected when scan signals are supplied to the scan lines S 1 to Sn to display images corresponding to data signals supplied from the data lines D 1 to Dm.
- the data lines D 1 to Dm are formed in the effective display region 1 ? 0 and are electrically connected to the integrated circuit 110 positioned under the effective display region 120 .
- the data lines D 1 to Dm receive the data signals from the integrated circuit 110 .
- the first pads 114 are formed outside the effective display region 120 . In one embodiment, the first pads 114 are formed near or adjacent to a first upper side, or corner of the lower substrate 112 . The first pads 114 are electrically connected to the integrated circuit 110 to receive the scan signals from the integrated circuit 110 . The first pads 114 are electrically connected to third pads 132 formed on an upper substrate 130 when the lower substrate 112 is coupled to the upper substrate 130 . In the embodiment shown, since the third pads 132 are electrically connected to the scan lines S 1 to Sn/2 formed near the upper end, or the upper half, of the effective display region 120 , the scan signals supplied from the integrated circuit 110 are sequentially supplied to the scan lines S 1 to Sn/2.
- the second pads 116 are formed outside the effective display region 120 .
- the second pads 116 may be formed on a second lower side, or corner, of the lower substrate 112 . This second lower corner is located diagonally opposite the first upper corner where the first pads 114 are formed.
- the second pads 116 are electrically connected to the integrated circuit 110 to receive the scan signals from the integrated circuit 110 .
- the second pads 116 are electrically connected to fourth pads 134 formed on the upper substrate 130 when the lower substrate 112 is coupled to the upper substrate 130 .
- the fourth pads 134 are electrically connected to the scan lines Sn/2+1 to Sn formed near the lower end, or lower half, of the effective display region 120 , the scan signals supplied from the integrated circuit 110 are sequentially supplied to the scan lines Sn/2+1 to Sn.
- the third pads 132 and the fourth pads 134 are formed on the upper substrate 130 .
- the third pads 132 are electrically connected to the scan lines S 1 to Sn/2 formed in the upper end, or upper half, of the effective display region 120 of the upper substrate 130 .
- the third pads 132 are electrically connected to the first pads 114 when the upper substrate 130 and the lower substrate 112 are attached to each other or coupled together. Therefore, the third pads 132 supply the scan signals supplied from the integrated circuit 110 to the scan lines S 1 to Sn/2.
- the fourth pads 134 are electrically connected to the scan lines Sn/2+1 to Sn formed near the lower end, or lower half, of the effective display region 120 of the upper substrate 130 .
- the fourth pads 134 are electrically connected to the second pads 116 when the upper substrate 130 and the lower substrate 112 are attached to each other. Therefore, the fourth pads 134 supply the scan signals supplied from the integrated circuit 110 to the scan lines Sn/2+1 to Sn.
- the dummy pads 118 are formed in a region adjacent to the second pads 116 .
- the dummy pads 118 are used for maintaining a substantially uniform gap (e.g., cell gap) when the upper substrate 130 and the lower substrate 112 are attached to each other. Therefore, the dummy pads 118 are formed to be substantially symmetrical to the second pads 116 .
- the dummy pads 118 are positioned near or adjacent to the second upper side of the lower substrate 112 (e.g., near the upper right corner of the lower substrate 112 in the orientation shown in FIG. 5 ) to be substantially symmetrical with the second pads 116 positioned on the second lower side.
- the dummy pads 118 formed on an upper corner of the lower substrate 112 on the same side. where the second pads 116 are located. Further, the dummy pads 116 are symmetrical with the second pads 118 with respect to a line of symmetry between the two pads 116 and 118 that substantially divides the lower substrate 112 into an upper portion and a lower portion.
- the dummy pads 118 are symmetrical with the second pads 116 , it is possible to maintain the gap substantially uniform when the upper substrate 130 and the lower substrate 112 are attached to each other. Therefore, it is possible to prevent spots from being generated by difference in brightness.
- the dummy pads 118 are used for maintaining the gap uniform, electrical signals need not be supplied from the outside to these dummy pads.
- the dummy pads positioned near or adjacent to an upper end of the effective display region are symmetrical with the pads positioned near or adjacent to a lower end of the effective display region so that it is possible to maintain the cell gap substantially uniform between the upper substrate and the lower substrate and to thus prevent spots from being generated by difference in brightness.
- FIG. 6 illustrates a passive matrix LCD 200 of an embodiment of the present invention.
- the passive matrix LCD 200 includes a liquid crystal panel 50 , a data driver 80 for driving data lines D 1 to Dm of the liquid crystal panel 50 , and a scan driver 60 for driving scan lines S 1 to Sn of the liquid crystal panel 50 .
- the liquid crystal panel 50 includes the pixels 40 positioned where the scan lines S 1 to Sn and the data lines D 1 to Dm cross over one another.
- the passive matrix LCD 200 is obtained by coupling the upper substrate 130 to the lower substrate 112 .
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- Chemical & Material Sciences (AREA)
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Abstract
Description
- This application claims priority to and the benefit of Korean Patent Application No. 10-2005-0119867, filed on Dec. 08, 2005, in the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates to a liquid crystal display, and more particularly to, a liquid crystal display capable of preventing spots from being generated by difference in brightness of various regions of the display.
- 2. Discussion of Related Art
- Recently, various flat panel displays (FPDs) having a lower weight and volume than cathode ray tubes (CRTs) have been developed. The FPDs include liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs), and organic light emitting displays (OLEDs).
- Among the FPDs, the LCDs are small and light and have low power consumption. Therefore, the LCDs have been in the spotlight as substitutes that can overcome the disadvantages of the conventional CRTs. Currently, the LCDs are used in large monitors and TVs as well as in portable devices such as mobile telephones and personal digital assistants (PDA). Passive matrix LCDs having low power consumption are often used for portable display devices.
-
FIG. 1 illustrates a conventional passive matrix LCD. - Referring to
FIG. 1 , the conventional passive matrix LCD includes aliquid crystal panel 2, adata driver 8 for driving data lines D1 to Dm of theliquid crystal panel 2, and ascan driver 6 for driving scan lines S1 to Sn of theliquid crystal panel 2. - The
liquid crystal panel 2 includespixels 4 positioned where the scan lines Si to Sn and the data lines D1 to Dm cross over one another. Thepixels 4 are selected when scan signals are supplied to the scan lines S1 to Sn to emit light components corresponding to data signals supplied to the data lines D1 to Dm. - The
scan driver 6 sequentially supplies the scan signals to the scan lines S1 to Sn in accordance with control signals from a timing controller that is not shown. - The
data driver 8 generates the data signals in accordance with the control signals from the timing controller and supplies the generated data signals to the data lines D1 to Dm in synchronization with the scan signals. - The conventional LCD is obtained by attaching an upper substrate and a lower substrate to each other. As illustrated in
FIG. 2 , anintegrated circuit 10 is mounted on alower substrate 12 of the LCD used for a portable device (for example, a mobile telephone). The circuits of thescan driver 6 and thedata driver 8 are included in the integratedcircuit 10. Therefore, the integratedcircuit 10 is commonly connected to the data lines D1 to Dm and the scan lines S1 to Sn. - Pixels (not shown) are arranged in a matrix in an
effective display region 20 of thelower substrate 12. The data lines D1 to Dm formed in theeffective display region 20 are electrically connected to the integratedcircuit 10 to receive the data signals from the integratedcircuit 10. On the other hand,first pads 14 are formed on a first side of theeffective display region 20 andsecond pads 16 are formed on a second side of theeffective display region 20 opposite the first side. Thefirst pads 14 are positioned near an upper side of theeffective display region 20 and are electrically connected to the integratedcircuit 10, and thesecond pads 16 are positioned near a lower side of theeffective display region 20 and are electrically connected to the integratedcircuit 10. When an upper substrate that is not shown and thelower substrate 12 are attached to each other or coupled together, thefirst pads 14 are electrically connected to the scan lines S1 to Sn/2 positioned in the upper part of theeffective display region 20 of the upper substrate and thesecond pads 16 are electrically connected to the scan lines Sn/2+1 to Sn positioned in the lower part of theeffective display region 20 of the upper substrate. - In the conventional LCD, the scan lines S1 to Sn and the data lines D1 to Dm are connected to the
integrated circuit 10 and theeffective display region 20 displays a predetermined image in response to the scan signals and the data signals supplied from theintegrated circuit 10. - Dummy
pads 18 are formed adjacent to thesecond pads 16. Thedummy pads 18 are used for maintaining a gap when the upper substrate and thelower substrate 12 are attached to each other. This gap corresponds to a cell gap created by formation of liquid crystal cells between the two substrates. However, in the conventional LCD, spots are generated by difference in brightness in the parts where thedummy pads 18 are formed and/or on the boundaries between thedummy pads 18 and thesecond pads 16. The spots are generated by non-uniformity in the heights of thedummy pads 18 and thesecond pads 16 when the upper substrate and thelower substrate 12 are attached to each other. - Accordingly, it is an aspect of the present invention to provide a liquid crystal display (LCD) capable of preventing spots from being generated by difference in brightness.
- According to a first aspect of the present invention, there is provided an LCD obtained by attaching or coupling an upper substrate and a lower substrate together. The LCD includes a first pad unit positioned on a first upper side, or a first upper corner, of the lower substrate, a second pad unit positioned on a second lower side, or a second lower corner, of the lower substrate, the first upper corner and the second lower corner located diagonally opposite each other, an integrated circuit electrically connected to the first pad unit and the second pad unit, and dummy pads positioned on a second upper side, or on the other upper corner, of the lower substrate. The dummy pads are substantially symmetrical to the second pads with respect to a line of symmetry dividing the lower substrate into an upper portion and a lower portion.
- In one embodiment, the dummy pads are not electrically connected to the integrated circuit. The LCD further includes data lines formed in an effective display region of the lower substrate to be electrically connected to the integrated circuit. The effective display region may also be called the display region. The first pad unit and the second pad unit are positioned outside the effective display region. The LCD further includes a third pad unit positioned on the upper substrate to be electrically connected to the first pad unit, a fourth pad unit positioned on the upper substrate to be electrically connected to the second pad unit, and scan lines formed in the effective display region of the upper-substrate to be electrically connected to the third pad unit and the fourth pad unit. The LCD further includes pixels positioned in the areas where the scan lines and the data lines cross over one another to display images corresponding to data signals supplied from the data lines.
- One embodiment includes a liquid crystal display having a first substrate and a second substrate coupled to and facing the first substrate. The first substrate includes a first display region, first pads, second pads, dummy pads and an integrated circuit. The second substrate includes a second display region facing the first display region, third pads electrically connected to the first pads and the fourth pads electrically connected to the second pads. The dummy pads are adapted to maintain a cell gap substantially uniform.
- These and/or other aspects and features of the invention will become apparent and more readily appreciated from the following description of the exemplary embodiments, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 illustrates a conventional passive matrix liquid crystal display (LCD); -
FIG. 2 illustrates a lower substrate of the conventional LCD; -
FIG. 3 illustrates a lower substrate of an LCD according to an embodiment of the present invention; -
FIG. 4 illustrates an upper substrate of the LCD according to the embodiment of the present invention; and -
FIG. 5 illustrates a dummy unit of the lower substrate illustrated inFIG. 3 . -
FIG. 6 illustrates a passive matrix LCD according to the embodiment of the present invention. - Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
-
FIGS. 3 and 4 schematically illustrate the lower substrate and the upper substrate of a passive matrix liquid crystal display (LCD) according to an embodiment of the present invention. The lower substrate and the upper substrate shown inFIGS. 3 and 4 may be used in the LCD ofFIG. 6 . - Referring to
FIGS. 3 and 4 , thelower substrate 112 of the LCD according to one embodiment of the present invention includes aneffective display region 120, an integratedcircuit 110,first pads 114,second pads 116, anddummy pads 118. Theeffective display region 120 may also be referred to as the display region. Thefirst pads 114, thesecond pads 116, and thedummy pads 118 may be respectively located in a first pad unit, a second pad unit, and a dummy pad unit. - Pixels 40 (shown in
FIG. 6 ) are located in theeffective display region 120 where the data lines D1 to Dm cross over scan lines S1 to Sn. The pixels are selected when scan signals are supplied to the scan lines S1 to Sn to display images corresponding to data signals supplied from the data lines D1 to Dm. - The data lines D1 to Dm are formed in the
effective display region 1?0 and are electrically connected to theintegrated circuit 110 positioned under theeffective display region 120. The data lines D1 to Dm receive the data signals from theintegrated circuit 110. - The
first pads 114 are formed outside theeffective display region 120. In one embodiment, thefirst pads 114 are formed near or adjacent to a first upper side, or corner of thelower substrate 112. Thefirst pads 114 are electrically connected to theintegrated circuit 110 to receive the scan signals from theintegrated circuit 110. Thefirst pads 114 are electrically connected tothird pads 132 formed on anupper substrate 130 when thelower substrate 112 is coupled to theupper substrate 130. In the embodiment shown, since thethird pads 132 are electrically connected to the scan lines S1 to Sn/2 formed near the upper end, or the upper half, of theeffective display region 120, the scan signals supplied from theintegrated circuit 110 are sequentially supplied to the scan lines S1 to Sn/2. - The
second pads 116 are formed outside theeffective display region 120. In one embodiment, thesecond pads 116 may be formed on a second lower side, or corner, of thelower substrate 112. This second lower corner is located diagonally opposite the first upper corner where thefirst pads 114 are formed. Thesecond pads 116 are electrically connected to theintegrated circuit 110 to receive the scan signals from theintegrated circuit 110. Thesecond pads 116 are electrically connected tofourth pads 134 formed on theupper substrate 130 when thelower substrate 112 is coupled to theupper substrate 130. In the embodiment shown, since thefourth pads 134 are electrically connected to the scan lines Sn/2+1 to Sn formed near the lower end, or lower half, of theeffective display region 120, the scan signals supplied from theintegrated circuit 110 are sequentially supplied to the scan lines Sn/2+1 to Sn. - The
third pads 132 and thefourth pads 134 are formed on theupper substrate 130. Thethird pads 132 are electrically connected to the scan lines S1 to Sn/2 formed in the upper end, or upper half, of theeffective display region 120 of theupper substrate 130. Thethird pads 132 are electrically connected to thefirst pads 114 when theupper substrate 130 and thelower substrate 112 are attached to each other or coupled together. Therefore, thethird pads 132 supply the scan signals supplied from theintegrated circuit 110 to the scan lines S1 to Sn/2. - The
fourth pads 134 are electrically connected to the scan lines Sn/2+1 to Sn formed near the lower end, or lower half, of theeffective display region 120 of theupper substrate 130. Thefourth pads 134 are electrically connected to thesecond pads 116 when theupper substrate 130 and thelower substrate 112 are attached to each other. Therefore, thefourth pads 134 supply the scan signals supplied from theintegrated circuit 110 to the scan lines Sn/2+1 to Sn. - In the LCD according to the embodiments of the present invention, the
dummy pads 118 are formed in a region adjacent to thesecond pads 116. Thedummy pads 118 are used for maintaining a substantially uniform gap (e.g., cell gap) when theupper substrate 130 and thelower substrate 112 are attached to each other. Therefore, thedummy pads 118 are formed to be substantially symmetrical to thesecond pads 116. For example, in the embodiment shown inFIG. 5 , thedummy pads 118 are positioned near or adjacent to the second upper side of the lower substrate 112 (e.g., near the upper right corner of thelower substrate 112 in the orientation shown inFIG. 5 ) to be substantially symmetrical with thesecond pads 116 positioned on the second lower side. As such, thedummy pads 118 formed on an upper corner of thelower substrate 112 on the same side. where thesecond pads 116 are located. Further, thedummy pads 116 are symmetrical with thesecond pads 118 with respect to a line of symmetry between the twopads lower substrate 112 into an upper portion and a lower portion. When thedummy pads 118 are symmetrical with thesecond pads 116, it is possible to maintain the gap substantially uniform when theupper substrate 130 and thelower substrate 112 are attached to each other. Therefore, it is possible to prevent spots from being generated by difference in brightness. On the other hand, since thedummy pads 118 are used for maintaining the gap uniform, electrical signals need not be supplied from the outside to these dummy pads. - As described above, in the LCD according to the embodiments of the present invention, the dummy pads positioned near or adjacent to an upper end of the effective display region are symmetrical with the pads positioned near or adjacent to a lower end of the effective display region so that it is possible to maintain the cell gap substantially uniform between the upper substrate and the lower substrate and to thus prevent spots from being generated by difference in brightness.
-
FIG. 6 illustrates apassive matrix LCD 200 of an embodiment of the present invention. Thepassive matrix LCD 200 includes aliquid crystal panel 50, adata driver 80 for driving data lines D1 to Dm of theliquid crystal panel 50, and ascan driver 60 for driving scan lines S1 to Sn of theliquid crystal panel 50. Theliquid crystal panel 50 includes thepixels 40 positioned where the scan lines S1 to Sn and the data lines D1 to Dm cross over one another. Thepassive matrix LCD 200 is obtained by coupling theupper substrate 130 to thelower substrate 112. - Although certain exemplary embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes might be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2005-0119867 | 2005-12-08 | ||
KR1020050119867A KR100762699B1 (en) | 2005-12-08 | 2005-12-08 | Liquid Crystal Display Device |
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US13/296,008 Continuation US20120060085A1 (en) | 2003-02-20 | 2011-11-14 | Method and equipment of asp service for multi-resolution image on the environment of multi-server |
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US20070132932A1 true US20070132932A1 (en) | 2007-06-14 |
US7714971B2 US7714971B2 (en) | 2010-05-11 |
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US11/545,995 Active 2028-11-11 US7714971B2 (en) | 2005-12-08 | 2006-10-10 | Liquid crystal display |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080013029A1 (en) * | 2006-06-29 | 2008-01-17 | Lg. Philips Lcd Co., Ltd. | Liquid crystal panel and liquid crystal display device having the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020109803A1 (en) * | 2000-12-28 | 2002-08-15 | Yu Hwan Seong | Liquid crystal display with electric graphic input panel |
US20030227593A1 (en) * | 2002-06-06 | 2003-12-11 | Alps Electric Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
US20040125263A1 (en) * | 2002-12-30 | 2004-07-01 | L.G.Philips Lcd Co., Ltd. | Liquid crystal display device and method of fabricating the same |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0749487A (en) * | 1993-08-04 | 1995-02-21 | Ricoh Co Ltd | Liquid crystal display element |
JPH09179131A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Ltd | Liquid crystal display device |
JP3276557B2 (en) * | 1996-05-23 | 2002-04-22 | 三菱電機株式会社 | Liquid crystal display |
JP2001013892A (en) * | 1999-06-30 | 2001-01-19 | Citizen Watch Co Ltd | Display device |
JP3614050B2 (en) | 1999-09-20 | 2005-01-26 | セイコーエプソン株式会社 | Conductor pattern inspection method and electro-optical device |
JP3843661B2 (en) | 1999-09-27 | 2006-11-08 | セイコーエプソン株式会社 | Electro-optical device manufacturing method and electro-optical device inspection method |
KR100351439B1 (en) * | 1999-10-04 | 2002-09-09 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display |
KR100488942B1 (en) * | 2001-05-17 | 2005-05-11 | 비오이 하이디스 테크놀로지 주식회사 | Tft-lcd with dummy pattern serving both as light shielding and repair |
JP2003084292A (en) * | 2001-09-13 | 2003-03-19 | Seiko Epson Corp | Liquid crystal device and electronic equipment |
JP2005070657A (en) * | 2003-08-27 | 2005-03-17 | Optrex Corp | Liquid crystal display panel |
KR20050058907A (en) * | 2003-12-13 | 2005-06-17 | 엘지.필립스 엘시디 주식회사 | A substrate for in-plane switching mode lcd and method for fabricating of the same |
-
2005
- 2005-12-08 KR KR1020050119867A patent/KR100762699B1/en active IP Right Grant
-
2006
- 2006-05-08 JP JP2006129192A patent/JP2007156396A/en active Pending
- 2006-10-10 US US11/545,995 patent/US7714971B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020109803A1 (en) * | 2000-12-28 | 2002-08-15 | Yu Hwan Seong | Liquid crystal display with electric graphic input panel |
US20030227593A1 (en) * | 2002-06-06 | 2003-12-11 | Alps Electric Co., Ltd. | Liquid crystal display device and manufacturing method of liquid crystal display device |
US20040125263A1 (en) * | 2002-12-30 | 2004-07-01 | L.G.Philips Lcd Co., Ltd. | Liquid crystal display device and method of fabricating the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080013029A1 (en) * | 2006-06-29 | 2008-01-17 | Lg. Philips Lcd Co., Ltd. | Liquid crystal panel and liquid crystal display device having the same |
US8421980B2 (en) * | 2006-06-29 | 2013-04-16 | Lg Display Co., Ltd. | Liquid crystal display device |
Also Published As
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US7714971B2 (en) | 2010-05-11 |
KR100762699B1 (en) | 2007-10-01 |
JP2007156396A (en) | 2007-06-21 |
KR20070060452A (en) | 2007-06-13 |
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